<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Stack parameters</title>
<link rel="help" href="http://www.mathml-association.org/MathMLinHTML5/S3.html#SS3.SSS2">
<meta name="assert" content="Element mfrac correctly uses the stack parameters from the MATH table.">
<!-- Copyright 2016 MathML Association
     Licensed under 3-Clause BSD-License -->
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  math, mspace {
    font-size: 10px;
  }
  @font-face {
    font-family: axisheight7000;
    src: url("fonts/stack-axisheight7000.woff");
  }
  @font-face {
    font-family: bottomdisplaystyleshiftdown5000;
    src: url("fonts/stack-bottomdisplaystyleshiftdown5000.woff");
  }
  @font-face {
    font-family: bottomshiftdown6000;
    src: url("fonts/stack-bottomshiftdown6000.woff");
  }
  @font-face {
    font-family: displaystylegapmin4000;
    src: url("fonts/stack-displaystylegapmin4000.woff");
  }
  @font-face {
    font-family: gapmin8000;
    src: url("fonts/stack-gapmin8000.woff");
  }
  @font-face {
    font-family: topdisplaystyleshiftup3000;
    src: url("fonts/stack-topdisplaystyleshiftup3000.woff");
  }
  @font-face {
    font-family: topshiftup9000;
    src: url("fonts/stack-topshiftup9000.woff");
  }
</style>
<script>
  var emToPx = 10 / 1000; // font-size: 10px, font.em = 1000
  var epsilon = 1;

  function getBox(aId) {
    return document.getElementById(aId).getBoundingClientRect();
  }

  var test_loaded = async_test("Page Loaded");
  window.addEventListener("load", function() {
    // FIXME: Use an API to wait for the Web fonts to arrive.
    window.setTimeout(runTests, 250);
  });

  function runTests() {
    test(function() {
      var v = 7000 * emToPx;
      assert_approx_equals(getBox("ref0001").top - getBox("num0001").bottom,
                           v, epsilon, "mfrac: axis height");
    }, "AxisHeight");

    test(function() {
      var v = 5000 * emToPx;
      assert_approx_equals(getBox("den0002").top - getBox("ref0002").bottom,
                           v, epsilon, "mfrac: denominator shift");
    }, "BottomDisplayStyleShiftDown");

    test(function() {
      var v = 6000 * emToPx;
      assert_approx_equals(getBox("den0003").top - getBox("ref0003").bottom,
                           v, epsilon, "mfrac: denominator shift");
    }, "BottomShiftDown");

    test(function() {
      var v = 4000 * emToPx;
      assert_approx_equals(getBox("den0004").top - getBox("num0004").bottom,
                           v, epsilon, "mfrac: gap");
    }, "DisplayStyleGapMin");

    test(function() {
      var v = 8000 * emToPx;
      assert_approx_equals(getBox("den0005").top - getBox("num0005").bottom,
                           v, epsilon, "mfrac: gap");
    }, "GapMin");

    test(function() {
      var v = 3000 * emToPx;
      assert_approx_equals(getBox("ref0006").top - getBox("num0006").bottom,
                           v, epsilon, "mfrac: numerator shift");
    }, "TopDisplayStyleShiftUp");

    test(function() {
      var v = 9000 * emToPx;
      assert_approx_equals(getBox("ref0007").top - getBox("num0007").bottom,
                           v, epsilon, "mfrac: numerator shift");
    }, "ToShiftUp");

    test_loaded.done();
  }
</script>
</head>
<body>
  <p>
    <math style="font-family: axisheight7000;">
      <mspace id="ref0001" depth="1em" width="3em" mathbackground="green"/>
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0001" mathbackground="blue"/>
        <mspace width="3em"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math display="block" style="font-family: bottomdisplaystyleshiftdown5000;">
      <mspace id="ref0002" width="3em" height="1em" mathbackground="green"/>
      <mfrac linethickness="0px">
        <mspace width="3em"/>
        <mspace width="3em" depth="1em" id="den0002" mathbackground="blue"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: bottomshiftdown6000;">
      <mspace id="ref0003" width="3em" height="1em" mathbackground="green"/>
      <mfrac linethickness="0px">
        <mspace width="3em"/>
        <mspace width="3em" depth="1em" id="den0003" mathbackground="blue"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math display="block" style="font-family: displaystylegapmin4000;">
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0004" mathbackground="blue"/>
        <mspace width="3em" depth="1em" id="den0004" mathbackground="green"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: gapmin8000;">
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0005" mathbackground="blue"/>
        <mspace width="3em" depth="1em" id="den0005" mathbackground="green"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math display="block" style="font-family: topdisplaystyleshiftup3000;">
      <mspace id="ref0006" width="3em" depth="1em" mathbackground="green"/>
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0006" mathbackground="blue"/>
        <mspace width="3em"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: topshiftup9000;">
      <mspace id="ref0007" width="3em" depth="1em" mathbackground="green"/>
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0007" mathbackground="blue"/>
        <mspace width="3em"/>
      </mfrac>
    </math>
  </p>
  <hr/>
</body>
</html>
